7137728065 has 8 divisors (see below), whose sum is σ = 9224140968. Its totient is φ = 5270937600.

The previous prime is 7137728063. The next prime is 7137728099. The reversal of 7137728065 is 5608277317.

It can be written as a sum of positive squares in 4 ways, for example, as 3560769 + 7134167296 = 1887^2 + 84464^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7137728065 - 2¹ = 7137728063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7137728063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54905536 + ... + 54905665.

It is an arithmetic number, because the mean of its divisors is an integer number (1153017621).

Almost surely, 2^7137728065 is an apocalyptic number.

It is an amenable number.

7137728065 is a deficient number, since it is larger than the sum of its proper divisors (2086412903).

7137728065 is a wasteful number, since it uses less digits than its factorization.

7137728065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109811219.

The product of its (nonzero) digits is 493920, while the sum is 46.

The square root of 7137728065 is about 84485.0759897865. The cubic root of 7137728065 is about 1925.3957079360.

The spelling of 7137728065 in words is "seven billion, one hundred thirty-seven million, seven hundred twenty-eight thousand, sixty-five".